James, D. Diagnostic soil testing for nitrogen availability. Logan: 1978 28 p. : ill.
James, D. Diagnostic soil testing for nitrogen availability. Logan: 1978 28 p. : ill.
James, D. (1978) Diagnostic soil testing for nitrogen availability, Logan: 28 p. : ill.
James, D. (1978). Diagnostic soil testing for nitrogen availability. The effects of nitrogen fertilizer rate, time, method of application and cropping pattern on residual soil nitrogen. Logan: 28 p. : ill.
James D. Diagnostic soil testing for nitrogen availability: The effects of nitrogen fertilizer rate, time, method of application and cropping pattern on residual soil nitrogen. Logan: 1978. p. 28 p. : ill.
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